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    <title>Document</title>
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    let p = new Promise((resolve, reject) => {
        setTimeout(() => {
            resolve('ok')
            // reject('err')
        }, 2000)

    })

    p.then((value) => {
        console.log(111);
        return new Promise(() => { }) //中断promise链
    }, ((reason) => {
        console.log('13', reason);
        return new Promise((resolve, reject) => {
            reject('错误了')
        })
    })).then((value) => {
        console.log(222);

    }, ((reason) => {
        console.log('出错了');
        return new Promise((resolve, reject) => {
            resolve('ok')
        })
    }))
    console.log(123);
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